STATEN ISLAND, N.Y. — Cindy Wilson is coy at age 19, a long-legged Georgian waif with bangs and blond tresses. Speaking to Swiss documentarian Steff Gruber about women’s lib and sexual freedom in a YouTube clip of footage taken at T.K. Harty’s Saloon in Atlanta, circa 1978, the pretty singer answers a query about relationships: "Guys are guys and girls are girls."